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Enzo DentiEnzo Denti 

Business Administration Specialist: reference error id: EMFXYXCZ

I've got this error checking the step 3

Challenge Not yet complete... here's what's wrong: 
There was an unexpected error while verifying this challenge. Usually this is due to some pre-existing configuration or code in the challenge Org. We recommend using a new Developer Edition (DE) to check this challenge. If you're using a new DE and seeing this error, please post to the developer forums and reference error id: EMFXYXCZ

It is a new Trailhead playground

Thanks, 
Vincenzo.

 
Best Answer chosen by Enzo Denti
NagendraNagendra (Salesforce Developers) 
Hi Enzo,

May I request you please confirm if you are using a brand new developer org for validating the challenge?

If you are using a brand new developer org then please double check that your org doesn't have a namespace enabled.If that doesn't help please give a try by restarting the batch

Still, if the problem persists log out of all accounts and log in once again in a different browser by clearing the cache and cookies which should probably do the trick.

Please let us know if this helps.

Mark this as solved if it's resolved.

Thanks,
Nagendra

All Answers

NagendraNagendra (Salesforce Developers) 
Hi Enzo,

May I request you please confirm if you are using a brand new developer org for validating the challenge?

If you are using a brand new developer org then please double check that your org doesn't have a namespace enabled.If that doesn't help please give a try by restarting the batch

Still, if the problem persists log out of all accounts and log in once again in a different browser by clearing the cache and cookies which should probably do the trick.

Please let us know if this helps.

Mark this as solved if it's resolved.

Thanks,
Nagendra
This was selected as the best answer
Enzo DentiEnzo Denti
Hi Negendra, 
That was definitely a brand new Trailhead Playground and I didn't modify the namespace. I have also tried to create another clear playground and do again the first and second steps, but I've got the same error ( I've posted another question before I've seen your answer). I'll try to clear the browser cache and cookies, but I have validated the step from 2 different laptops, and I've got the same error.

Thanks,
Enzo
Enzo DentiEnzo Denti
Found the problem, I didn't read properly the instructions, and I didn't refresh the dashboards